1685016430887 has 4 divisors (see below), whose sum is σ = 2246688574520. Its totient is φ = 1123344287256.

The previous prime is 1685016430879. The next prime is 1685016430901. The reversal of 1685016430887 is 7880346105861.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1685016430887 - 2³ = 1685016430879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685016430087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280836071812 + ... + 280836071817.

It is an arithmetic number, because the mean of its divisors is an integer number (561672143630).

Almost surely, 2^{1685016430887} is an apocalyptic number.

1685016430887 is a deficient number, since it is larger than the sum of its proper divisors (561672143633).

1685016430887 is an equidigital number, since it uses as much as digits as its factorization.

1685016430887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561672143632.

The product of its (nonzero) digits is 7741440, while the sum is 57.

The spelling of 1685016430887 in words is "one trillion, six hundred eighty-five billion, sixteen million, four hundred thirty thousand, eight hundred eighty-seven".